Intake manifold



April 28, 1953 J. c. TAYLOR INTAKE MANIFOLD Filed Oct. 18, 1949 I INVENTOR cf. 6". To. Z0 2 ATTORNEY Patented Apr. 28, 1953 UNITED STATES PTENT OFFICE INTAKE MANIFOLD Jim 0. Taylor, Oklahoma City, Okla. Application October 18, 1949, Serial No. 121,927

1 Claim. 1

This invention relates to intake manifolds for internal combustion engines and the primary object of the invention is to provide an intake manifold designed to produce maximum operating efficiency in internal combustion engines.

Another object of the invention is to provide an intake manifold of the character indicated above enabling an internal combustion engine equipped therewith to completely fill its cylinders with fuel mixture during the intake stroke.

A further object of the invention is to provide an intake manifold of the character indicated above adapted to prevent pumping losses of the engine equipped with the manifold by reducing atmospheric pressure restrictions as far as possible.

A still further object of the invention is to provide an intake manifold of the character indicated above adapted to control the mixture of fuel and air taking place in the intake manifold with regard to temperature, velocity, mixture conditions, mixture ratio and distribution.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved intake manifold whereby certain advantages are attained, as will be hereinafter more fully set forth.

In order that my invention may be better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure 1 is a view in top plan of an intake manifold in accordance with the present invention;

Figure 2 is a front view in elevation; and

Figure 3 is a view in section taken on line 3-3 of Figure 2.

The intake manifold herein embodied comprises a main mixing tube made from thin walled seamless tubing and closed at both ends. Two carburetor risers ll extend radially in the same direction from the main mixing tube I 6 and are also made from thinwalled seamless tubing. The two carburetor risers II are disposed equidistantly from the ends of the main mixing tube [0. Each carburetor riser is provided on its end portion with a carburetor flange l2 adapted to support a carburetor C fragmentarily shown in Figures 2 and 3.

A plurality of cylinder head port risers I3 also made from thinwalled seamless tubing extend radially in the same direction from the main mixing tube I0 and at obtuse angles to the carburetor risers H. The cylinder head port risers l3 are disposed equidistantly from each other along the main mixing tube and each of said risers is equipped on its end portion with a cylinder head port flange l4 arranged on the riser l3 at such an angle that it is parallel to the carburetor risers l I.

An external equalizer tube l5 extends between the two carburetor risers I I and is also made from thinwalled seamless tubing. It communicates with the two carburetor risers II and runs parallel to the main mixing tube l6. Centrally between the two carburetor risers l I a vacuum connection I6 is provided on the equalizer tube Hi to permit the use of vacuum operated devices such as brakes, crank case ventilators (not shown) and the like.

In internal combustion engines complete evaporation of the fuel is not necessary until the end of the compression stroke so that the mixture needs only to be partly evaporated when leaving the manifold. By arranging two air inlets or carburetor risers the efficiency of the engine is improved by lowering pumping losses due to atmospheric restriction. The use of seamless tubing having a smooth inner surface further increases the volumetric efiiciency of the engine.

A manifold as herein embodied supplies a partly evaporated or atomized fuel mixture containing excess air adequate for proper air and fuel ratio. Such a mixture improves engine performance by maintaining a low temperature of the mixture leaving the manifold and depending on the engine temperature from intake stroke to the end of compression stroke to aid in completing the evaporation of the fuel. The maintaining of a low temperature of the fuel mixture in the manifold is facilitatedby using thin walled tubing.

The disposition of the equalizer tube in approximately equal distances from the carburetors and the main mixing tube provides an even mixture of fuel and air before entering the manifold proper, and the arrangement of the carburetor risers as described above regulates the distribution of the fuel mixture.

Iclaim:

An intake manifold of the class described including a main mixing tube, two carburetor risers extending radially in the same direction from said main mixing tube, a plurality of cylinder head port risers extending radially in the same direction from the main mixing tube and at obtuse angles to the carburetor risers, an equalizer tube extending between and communicating with the carburetor risers, and a vacuum connection provided on the equalizing tube centrally between the two carburetor risers.

JIM C. TAYLOR.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,361,619 Roos Dec. 7, 1920 1,763,726 Timian June 17, 1930 1,860,373 Timian May 31, 1932 1,929,637 Hall Oct. 10, 1933 1,944,206 Ball et a1 Jan. 23, 1934 2,160,922 Sullivan June 6, 1939 2,282,311 Ericson et a1 May 12, 1942 2,323,442 Beard July 6, 1943 

